Product Application
This series of electric pumps has no lower limit on head. It can operate within the maximum head range, featuring high head, high efficiency and wide high-efficiency zone. It is widely used for long-distance water transmission & irrigation, high-efficiency oxygen aeration in aquaculture, deep well water extraction, urban & rural tap water pressure boosting, mine water supply & drainage, as well as transporting syrup and non-corrosive chemical liquids in food and chemical industries.
Operating Conditions
The electric pump can work continuously and normally under the following operating conditions:
- Medium temperature shall not exceed +35°C;
- The pH value of the medium is between 6.5 and 8.5;
- Mass ratio of solid impurities shall not exceed 3%, particle size ≤0.2mm, fiber length ≤0.3 times of rotor pitch;
- Power supply frequency: 50Hz; Voltage: single-phase AC 220V, three-phase 380V. Voltage fluctuation range: ±10% of rated value;
- Maximum submersible depth shall not exceed 70m.
| Model | Power (kW) | Pipe Diameter (mm) | Flow Rate | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single-phase 220V | Three-phase 380V | m³/h | 0 | 1.2 | 2.4 | 3.6 | 4.8 | 6.0 | 7.2 | 7.2 | ||
| L/min | 0 | 20 | 40 | 60 | 80 | 100 | 120 | 120 | ||||
| QGYD1.2-50 | – | 0.37 | 25 | H (m) | 90 | 73 | 57 | 40 | 22 | 8 | – | – |
| QGYD1.8-50 | – | 0.5 | 25 | 100 | 77 | 65 | 52 | 39 | 25 | 14 | 5 | |
| QGYD1.2-100 | – | 0.55 | 25 | 160 | 127 | 105 | 75 | 48 | 20 | – | – | |
| QGYD1.8-100 | QGY1.8-100 | 0.75 | 25 | 170 | 144 | 125 | 104 | 83 | 29 | 14 | 8 | |
| QGYD2-105 | – | 0.8 | 25 | 170 | 144 | 125 | 104 | 83 | 29 | 14 | 8 | |
Product Structure & Features
The oil-filled submersible screw pump consists of three main parts: pump assembly, sealing assembly and electric motor. The pump assembly is installed at the upper section of the pump, with screw rotor and rubber stator as its core components. The motor is mounted at the bottom, available in single-phase or three-phase asynchronous type. A single-face mechanical seal is adopted between pump assembly and motor. Oil-resistant O-rings are used for static sealing at all fixed spigot joints.
This pump series has no lower limit on working head. It can operate stably within the maximum head range. Outstanding advantages include high head, high efficiency and a wide high-efficiency working zone.
Application Scenarios
- Long-distance water transportation and farmland irrigation
- High-efficiency aeration for aquaculture
- Deep well water extraction
- Water pressure boosting for urban and rural tap water supply
- Water supply & drainage in mines
- Transportation of syrup and non-corrosive chemical liquids in food and chemical industries
Operating Conditions
The pump can run continuously under the following conditions:
- Liquid medium temperature ≤ +35°C
- Medium pH value: 6.5 ~ 8.5
- Mass fraction of solid impurities ≤3%; particle size ≤0.2mm; fiber length ≤0.3 times rotor pitch
- Power supply: 50Hz; single-phase AC 220V / three-phase 380V; allowable voltage fluctuation: ±10% of rated voltage
- Maximum submergence depth: 70 meters
Maintenance & Precautions
- Before installation, inspect cable integrity and insulation resistance; check for damage on mechanical seal and O-rings.
- Strictly comply with the submergence depth requirement. Do not run the pump out of water; dry running will quickly damage the rubber stator.
- The pumped medium must meet impurity limits. Large grains, long fibers or high solid content will cause stator wear and blockage.
- Check power supply voltage regularly. Avoid long-time operation when voltage exceeds the ±10% tolerance.
- Periodically inspect oil chamber for oil leakage. Replace oil-resistant O-rings and mechanical seal once leakage occurs.
- If the pump stays idle for a long time, lift it out from the well, clean the pump body, and store in a dry place.
- Do not use this pump to deliver corrosive liquids or liquids with excessive solid particles beyond specification.